Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dabf3f200fdfb09…

MALICIOUS

PDF

97.2 KB Created: 2021-09-05 18:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 23c70dd8e5ee37b7cf5f7f1c63b32aad SHA-1: e7eb338dc92a32e5cc2a507521ffe7d128126ea2 SHA-256: 7dabf3f200fdfb09af99454b86597e60cac1fd8261f0cc9209057436d8d5772e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pistant.ru/uplcv?utm_term=ford+focus+hatchback+2012+manual PDF link annotation
    • http://karinameal.com/imgdish/files/52791803575.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/dejiwelixesana.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af82720a567---40066253712.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/52167980352.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/liziven.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/goxopuzulezimemuta.pdfIn PDF document text
    • https://majubesar.info/contents//files/88345795277.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/dafeme.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d142a15dd---saxizedoxomapefofe.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/99jgpnmhrbmfrb7c5b2jrrqsp1/19708918836.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/12642061665.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff5a53247c---20254289855.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/zemelizo.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///61093296477.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/gefagopuwitumijasarewaz.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d44da5273---suderupopuveme.pdfIn PDF document text
    • https://fasleh.net/Files/files/55053751567.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cdb8b38d0---dozipevalowo.pdfIn PDF document text
    • https://songhong.info/userfiles/file/juzixebogidinoki.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/78388978880.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/pebisipazupot.pdfIn PDF document text
    • http://cuatudongsaigon.vn/uploads/files/xepubetari.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/vonezude.pdfIn PDF document text
    • http://olympusflights.com/files/files/gones.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E5 11120 bytes
SHA-256: de2371e0a6ed30842b7f935ddcca0f82ec155dc0114cd317f69ff85d251567c4
font_01_sfnt_off00012abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D0 20728 bytes
SHA-256: de4a83d73e18aa2676532e1cb146e9cfafce249986524c1ee4fb1560e0b2c34f

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